Data from two nationwide surveys suggest that spam is beginning to undermine the integrity of email and even to discourage its use. The vast majority of Internet users are outspoken in their disdain for spam, although enough of them respond to commercial offers that spam remains a viable source of income to spammers. While most users want to do the right thing to avoid and get rid of spam, they...

One of the biggest challenges in building effective anti-spam solutions is designing systems to defend against the ever-evolving bag of tricks spammers use to defeat them. Because of this, spam filters that work well today may not work well tomorrow. The adversarial nature of the spam problem makes large, up-to-date, and diverse e-mail corpora critical for the development and evaluation of new ...

The significant increase in the volume of fake (spam) messages has led to an urgent need develop and implement a robust anti-spam method. Several current systems depend mainly on word order message determining spam message, which results system's inability predict correct type when changes. In this paper, new framework is proposed for filtering that does not word's position called Trigonometric...

Although anti-spam measures are improving, the spam volume is increasing due to the use of Botnets. Botnets facilitate an efficient generation and guaranteed delivery of large volumes of spam. Spambots, or spam-generating bots, use different transmission methods based on the network settings of the infected host. These methods include relaying, proxying, and direct delivery. In this paper, we i...

This paper describes a new approach to anti-spam techniques. Instead of having spam filtering software implemented at a mail client or server, we build a mail server agent called MT Proxy to deal with any spam related issue. This server acts a mediate firewall to securely protect our real SMTP mail server. All emails are allowed to come to their recipients, but at either slow or fast speed, dep...

Recently the number of undesirable messages coming to e-mail has strongly increased. As spam has changeable character the anti-spam systems should be trainable and dynamical. The machine learning technology is successfully applied in a filtration of e-mail from undesirable messages for a long time. In this paper it is offered to apply Case Based Reasoning technology to a spam filtering problem....

It is well known that Unsolicited Commercial Emails (UCE), commonly known as spam, are becoming a serious problem for email accounts of single users, small companies and large institutions. The presence of spam can seriously compromise normal user activities, forcing to navigate through mailboxes to find the relatively few interesting emails, so wasting time and bandwidth, occupying their stora...

Testing content-based anti-spam systems requires a plentiful source of both spam and ham. We examine the viability of Usenet postings as a ham source. While Usenet postings have been used before for this purpose, we refine the idea and show empirically that it is the text of Usenet replies that provides the best cut of ham.

The Short Message Service (SMS) have an important economic impact for end users and service providers. Spam is a serious universal problem that causes problems for almost all users. Several studies have been presented, including implementations of spam filters that prevent spam from reaching their destination. Naïve Bayesian algorithm is one of the most effective approaches used in filtering te...

The term ‘spam’ addresses unsolicited emails sent in bulk; therefore, the term‘financial fraud spam’ refers to unwanted bulk emails in which different tricks and techniques areemployed to swindle money from the recipients. Estimates show that more than 80% of worldwideemail traffic in 2011 was spam. It should be noted that while the number of daily spam emails in2002 was 2.4 billion, this numbe...